CN114658045B - Active retaining wall repairing construction method - Google Patents
Active retaining wall repairing construction method Download PDFInfo
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- CN114658045B CN114658045B CN202210396278.XA CN202210396278A CN114658045B CN 114658045 B CN114658045 B CN 114658045B CN 202210396278 A CN202210396278 A CN 202210396278A CN 114658045 B CN114658045 B CN 114658045B
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- anchor
- active retaining
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 62
- 239000002689 soil Substances 0.000 claims abstract description 29
- 238000007667 floating Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 94
- 239000010959 steel Substances 0.000 claims description 94
- 238000005096 rolling process Methods 0.000 claims description 60
- 230000002787 reinforcement Effects 0.000 claims description 18
- 239000004567 concrete Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 201000010099 disease Diseases 0.000 claims description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 5
- 239000011381 foam concrete Substances 0.000 claims description 4
- 239000011376 self-consolidating concrete Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 239000000945 filler Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
- E02D29/0233—Retaining or protecting walls comprising retention means in the backfill the retention means being anchors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D35/00—Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations
- E02D35/005—Lowering or lifting of foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Abstract
The invention relates to a construction method for repairing an active retaining wall, wherein a temporary stay bar is arranged between the active retaining wall and a foundation soil body, and a positioning bolt is adopted to apply lateral support to the temporary stay bar and the active retaining wall; the anti-slip anchor piles are inserted into the guide holes at the toe part of the retaining wall foundation, and the upper surface and the front end of the toe of the retaining wall foundation are respectively provided with a closed cover plate and a toe support pier; the method comprises the steps that stiffening connecting ribs and wall top reinforcing plates are arranged between an active retaining wall and a wall body lifting body; a platform supporting rib is arranged on the wall top reinforcing plate towards the supporting soil retaining body; arranging a wall back reinforcing rib and a wall back pouring body along the wall body lifting body and the wall back side of the active retaining wall, and arranging a rear anchor tie bar between the wall back reinforcing rib and the supporting retaining wall; embedding a sinking anchor plate and anti-floating anchor bars in a wall back water collecting layer, and sequentially arranging a light filling body and a wall back hardening layer at the upper part of the wall back water collecting layer; the invention can reduce the difficulty of lifting the active retaining wall and improve the bearing performance of the active retaining wall.
Description
Technical Field
The invention belongs to the field of civil engineering, and particularly relates to an active retaining wall repairing construction method.
Background
In the fields of highways, railways, port engineering, constructional engineering and the like, the retaining wall is often damaged, heightened and the like in the use process. In order to improve the stability of the active retaining wall and realize the reserved use of the active retaining wall, targeted disease treatment measures are often required to be adopted according to the disease condition of the retaining wall. When the active retaining wall is repaired and constructed, how to improve the anti-slip performance and anti-overturning performance of the retaining wall structure, reduce the wall back soil pressure of the retaining wall and improve the construction efficiency is always the key point and the difficulty of engineering control.
In the prior art, a construction method for applying the pile plate wall to the repairing and reinforcing of the existing reinforced earth retaining wall is provided, and a composite wall body with high strength is formed by utilizing the friction force between a reinforced earth retaining wall rib belt and filling earth, so that the lateral earth pressure generated by the earth body behind the wall is resisted; the comprehensive internal friction angle of the roadbed filler is improved through the reinforced earth retaining wall, so that the stability of the roadbed is improved; and the reinforced soil retaining wall panel can still be in a stable state after falling off through settlement and displacement monitoring of the roadbed slope. The technology adopts the pile plate wall to improve the bearing performance of the retaining wall in the construction of the existing reinforced earth retaining wall, but the technology is difficult to synchronously improve the supporting performance of the wall body, reduce the earth pressure on the back of the wall and improve the bearing performance of the wall body.
In view of this, in order to improve the construction quality and reduce the construction difficulty of the active retaining wall repairing structure, it is currently required to invent an active retaining wall repairing structure construction method capable of improving the safety of the active retaining wall, reducing the lifting difficulty of the active retaining wall and improving the bearing performance of the active retaining wall.
Disclosure of Invention
The invention aims at overcoming the defects, and provides a construction method for repairing an active retaining wall.
The scheme adopted by the invention for solving the technical problem is that the construction method for repairing the active retaining wall comprises the following steps:
step one, construction preparation: performing active retaining wall disease test, and preparing materials and devices required by construction;
step two, temporary supporting body layout: a wall surface support plate is arranged on the wall surface of the active retaining wall, a counter-force support pier and a support pier anchor plate for supporting the counter-force support pier are arranged on the foundation soil body, and the support pier anchor plate is firmly connected with the foundation soil body through the support anchor pier; firstly, respectively arranging a wall surface supporting plate and a counter-pressure supporting plate at two ends of the temporary supporting rod, then arranging the temporary supporting rod between the wall surface and the counter-force supporting pier to enable the wall surface supporting plate to abut against the active retaining wall and the wall surface supporting plate above the active retaining wall, and installing a positioning bolt on the counter-pressure supporting plate in a threaded manner to enable the positioning bolt to abut against the counter-force supporting pier, and applying a jacking force to the temporary supporting rod and the active retaining wall by using the positioning bolt;
step three, wall toe reinforcement treatment: inserting anti-slip anchor piles into the guide holes of the foundation soil body at the toe part of the retaining wall foundation at the lower end of the active retaining wall, and filling anchor pile filling bodies and stiff reinforcement bodies into the tube cores of the anti-slip anchor piles; a supporting anchor bar is arranged between the built-in anchor plate at the top end of the stiff reinforcement body and the retaining wall foundation; respectively constructing a closed cover plate and a wall toe supporting pier on the upper surface and the front end of a retaining wall foundation wall toe, and presetting cover plate connecting ribs adjacent to an active retaining wall in the rear end of the closed cover plate;
step four, wall lifting body setting: removing an original wall back filling body at the upper part of the back part of the active retaining wall, and inserting a rear anchor lacing wire into a leading hole of a branch retaining body at the back side of the original wall back filling; inserting a stiff connecting rib into a top leading hole of the active retaining wall, arranging a wall top reinforcing plate at the top of the active retaining wall, and firmly connecting the wall top reinforcing plate with the stiff connecting rib; casting concrete on the top support mould of the active retaining wall to form a wall body lifting body; the upper surfaces of the longitudinally adjacent wall top stiffening plates are provided with stiffening plate connecting ribs, platform supporting ribs are arranged between the wall top stiffening plates and the supporting soil retaining bodies, the upper ends of the platform supporting ribs are connected with the wall top stiffening plates, and the lower ends of the platform supporting ribs are inserted into the original wall back filling bodies;
fifthly, constructing a wall back casting body: paving a wall back reinforcing rib with an L-shaped cross section along the wall body lifting body and the wall back side of the active retaining wall, firmly connecting the wall back reinforcing rib with the wall body lifting body and the active retaining wall by using a wall back anchor rib, and firmly connecting the upper end of a rear anchor tie rib with the lower end of the wall back reinforcing rib; the wall back reinforcing rib and the wall top reinforcing plate are provided with oblique reinforcing ribs for connecting the two, and a wall back pouring body is arranged on the side, away from the active retaining wall, of the wall back reinforcing rib;
step six, constructing a wall back catchment layer: a rear drain pipe is inserted in a wall body drill hole along the longitudinal direction of the active retaining wall above the original drain pipe of the active retaining wall; paving a wall back water collecting layer on the upper surface of the original wall back filling body, and enabling the wall back water collecting layer to be communicated with a rear drain pipe; embedding a sinking anchor plate and an anti-floating anchor bar in a wall back catchment layer, and fixedly mounting the sinking anchor plate at the lower end of the anti-floating anchor bar;
seventh, wall back soil mass filling: pouring a light filling body on the upper part of the wall back water collecting layer, and installing a filling pressing plate on the top end of the anti-floating anchor bar, wherein the upper end of the filling pressing plate is higher than the light filling body; and pouring a wall back hardening layer on the top surface of the light filling body, and covering the filling pressing plate.
In the second step, the counter-force support pier is formed by rolling a steel plate, the cross section of the counter-force support pier is in a right triangle shape, and the anchor plate of the support pier is welded on the side of the counter-force support pier, which is away from the active retaining wall; the support pier anchor plate is formed by rolling a steel plate, and holes for supporting anchor piers to penetrate are preset in the support pier anchor plate; the supporting anchor pier is formed by rolling steel pipes or section steel; the temporary stay bar is formed by rolling steel pipes or section steel, and two ends of the temporary stay bar are respectively welded with the wall surface stay plate and the back pressure stay plate; the back pressure supporting plate is formed by rolling a steel plate, and screw holes for connecting with positioning bolts are preset on the back pressure supporting plate.
Further, in the third step, the cross section of the toe pier is rectangular, the width is 0.5-1m, and the height extends to 0.5-2m below the elevation of the foundation bottom surface of the retaining wall.
Further, in the third step, the anti-skid anchor pile is formed by rolling a round steel pipe; the anchor pile filling body adopts self-compacting concrete; the stiff reinforcement body is formed by rolling profile steel or steel pipes, and the top end of the stiff reinforcement body is vertically welded and connected with the built-in anchor plate; the supporting anchor bar is formed by rolling steel pipes or steel bars or steel plates; the closed cover plate and the toe support pier are integrally prepared from reinforced concrete materials.
In the fourth step, the stiff connecting rib is formed by rolling steel pipes or section steel or steel plates, one end of the stiff connecting rib is inserted into a wall body at the top end of the active retaining wall, and the other end of the stiff connecting rib extends out of the top surface of the wall top reinforcing plate by 20-50cm and is welded with the wall top reinforcing plate; the wall top stiffened plate is formed by rolling steel plates and is distributed at equal intervals along the longitudinal direction of the active retaining wall; the wall body lifting body is made of reinforced concrete materials; the platform supporting rib consists of a stiff steel pipe and a pipe cavity grouting body in the stiff steel pipe, and slurry overflow holes are formed in the side wall of the stiff steel pipe.
Further, in the fifth step, the wall back reinforcing ribs are formed by rolling steel plates and are uniformly distributed at intervals along the longitudinal direction of the active retaining wall, and holes for the rear anchor tie bars, the wall back anchor bars and the rear drain pipes to penetrate are preset in the wall back reinforcing ribs.
Further, in the sixth step, the wall back water-collecting layer adopts open graded medium coarse sand or sand gravel; the sinking anchor plate is formed by rolling a steel plate, and the upper surface of the sinking anchor plate is vertically welded and connected with the anti-floating anchor bars; the anti-floating anchor bar is formed by rolling steel pipes or deformed bars.
Further, in the seventh step, the lightweight filler has a density of 0.8-1.0g/cm 3 Is a foam concrete of (2); the wall back hardening layer adopts concrete.
Compared with the prior art, the invention has the following beneficial effects: the construction quality of the active retaining wall restoration can be improved, the construction difficulty is reduced, the active retaining wall can be heightened and reserved by the restoration structure, the anti-slip performance and anti-overturning performance of the retaining wall structure are improved, the safety of the active retaining wall can be improved, the difficulty of lifting the active retaining wall is reduced, and the bearing performance of the active retaining wall is improved.
Drawings
The patent of the invention is further described below with reference to the accompanying drawings.
Fig. 1 is a flow chart of repair structure construction.
Fig. 2 is a schematic view of an active retaining wall repair structure.
Fig. 3 is a schematic diagram of a wall top stiffener and stiffener connection structure.
Fig. 4 is a schematic view of a platform support bar structure.
In the figure: 1-active retaining wall; 2-a wall support plate; 3-foundation soil mass; 4-counterforce bracing piers; 5-bracing anchor plates; 6-supporting anchor piers; 7-temporary stay bars; 8-wall bracing plates; 9-back pressure supporting plate; 10-positioning bolts; 11-a retaining wall foundation; 12-anti-skid anchor piles; 13-anchor pile filling body; 14-stiff reinforcement; 15-an embedded anchor plate; 16-supporting anchor bars; 17-closing the cover plate; 18-wall toe piers; 19-cover plate connecting ribs; 20-an original wall back filling body; 21-supporting soil body; 22-post anchor tie bars; 23-stiffness connecting ribs; 24-wall top stiffened plates; 25-wall elevation; 26-reinforcing plate connecting ribs; 27-a platform support rib; 28-wall back reinforcing ribs; 29-wall back anchor bars; 30-oblique reinforcing ribs; 31-wall back casting; 32-a rear drain pipe; 33-a wall backing water sink layer; 34-sinking the anchor plate; 35-a lightweight filler; 36-filling a pressing plate; 37-wall back hardened layer; 38-anti-floating anchor bars; 39-raw drain pipe; 40-stiff steel pipe; 41-lumen grouting; 42-slurry overflow hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The concrete pouring construction technical requirements, the formwork support construction technical requirements, the design and construction technical requirements of the lateral deformation retaining pile, the jack jacking construction technical requirements, the design and construction technical requirements of the retaining wall and the like are not repeated in the embodiment, and the embodiment of the method is mainly described.
As shown in fig. 1 to 4, the construction method for repairing the active retaining wall comprises the following steps:
step one, construction preparation: performing disease test on the active retaining wall 1, and preparing materials and devices required by construction;
step two, temporary supporting body layout: a wall surface support plate 2 is arranged on the wall surface of the active retaining wall, a counter-force support pier 4 and a support pier anchor plate 5 for supporting the counter-force support pier are arranged on a foundation soil body 3, and the support pier anchor plate is firmly connected with the foundation soil body through a support anchor pier 6; the temporary stay bar 7 is taken, a wall surface stay plate 8 and a counter-pressure stay plate 9 are respectively arranged at two ends of the temporary stay bar, the temporary stay bar is arranged between a wall surface and a counter-force stay block, the wall surface stay plate is abutted against an active retaining wall and the wall surface stay plate above, the counter-pressure stay plate is in threaded connection with a positioning bolt 10, the positioning bolt is abutted against the counter-force stay block, and a jacking force is applied to the temporary stay bar and the active retaining wall by the positioning bolt;
step three, wall toe reinforcement treatment: inserting an anti-slide anchor pile 12 into a foundation soil body guiding hole at the toe part of a retaining wall foundation 11 at the lower end of the active retaining wall, and filling an anchor pile filling body 13 and a stiff reinforcement body 14 into the core of the anti-slide anchor pile; a supporting anchor bar 16 is arranged between the built-in anchor plate 15 at the top end of the stiff reinforcement body and the retaining wall foundation; respectively constructing a closed cover plate 17 and a wall toe supporting pier 18 on the upper surface and the front end of a retaining wall foundation wall toe, and presetting a cover plate connecting rib 19 adjacent to an active retaining wall in the rear end of the closed cover plate;
step four, wall lifting body setting: removing an original wall back filling body 20 at the upper part of the back part of the active retaining wall, and inserting a rear anchor tie bar 22 into a guide hole of a retaining soil body 21 at the back side of the original wall back filling; the method comprises the steps that a stiff connecting rib 23 is inserted into a top leading hole of an active retaining wall, a wall top reinforcing plate 24 is arranged at the top of the active retaining wall, and the wall top reinforcing plate is firmly connected with the stiff connecting rib; casting concrete on the top support mould of the active retaining wall to form a wall body lifting body 25; the upper surfaces of the longitudinally adjacent wall top stiffening plates are provided with stiffening plate connecting ribs 26, platform supporting ribs 27 are arranged between the wall top stiffening plates and the supporting soil retaining bodies, the upper ends of the platform supporting ribs are connected with the wall top stiffening plates, and the lower ends of the platform supporting ribs are inserted into the original wall back filling bodies;
fifthly, constructing a wall back casting body: paving a wall back reinforcing rib 28 with an L-shaped cross section along the wall body lifting body and the wall back side of the active retaining wall, firmly connecting the wall back reinforcing rib with the wall body lifting body and the active retaining wall by using a wall back anchor rib 29, and firmly connecting the upper end of the rear anchor tie rib with the lower end of the wall back reinforcing rib; the wall back reinforcing rib and the wall top reinforcing rib plate are provided with an inclined reinforcing rib 30 for connecting the two, and the wall back pouring body 31 is arranged on the side of the wall back reinforcing rib, which is away from the active retaining wall;
step six, constructing a wall back catchment layer: a rear drain pipe 32 is inserted in the wall body drill hole along the longitudinal direction of the active retaining wall above the original drain pipe 39 of the active retaining wall; paving a wall back water collecting layer 33 on the upper surface of the original wall back filling body, and communicating the wall back water collecting layer with a rear drain pipe; embedding a sinking anchor plate 34 and an anti-floating anchor bar 38 in a wall back catchment layer, and fixedly mounting the sinking anchor plate at the lower end of the anti-floating anchor bar;
seventh, wall back soil mass filling: firstly, pouring a light filling body 35 at the upper part of a wall back water collecting layer, and installing a filling pressing plate 36 at the top end of an anti-floating anchor bar, wherein the upper end of the filling pressing plate is higher than the light filling body; and pouring a wall back hardening layer 37 on the top surface of the light filling body, and covering the filling pressing plate.
In the second step, the counterforce support pier is formed by rolling a steel plate, the cross section of the counterforce support pier is in a right triangle shape, and the anchor plate of the support pier is welded on the side of the counterforce support pier, which is away from the active retaining wall; the support pier anchor plate is formed by rolling a steel plate, and holes for supporting anchor piers to penetrate are preset in the support pier anchor plate; the supporting anchor pier is formed by rolling steel pipes or section steel; the temporary stay bar is formed by rolling steel pipes or section steel, and two ends of the temporary stay bar are respectively welded with the wall surface stay plate and the back pressure stay plate; the back pressure supporting plate is formed by rolling a steel plate, and screw holes for connecting with positioning bolts are preset on the back pressure supporting plate.
In the third step, the cross section of the toe pier is rectangular, the width is 0.5-1m, and the height extends to 0.5-2m below the elevation of the foundation bottom surface of the retaining wall.
In the third step, the anti-skid anchor pile is formed by rolling a round steel pipe; the anchor pile filling body adopts self-compacting concrete; the stiff reinforcement body is formed by rolling profile steel or steel pipes, and the top end of the stiff reinforcement body is vertically welded and connected with the built-in anchor plate; the supporting anchor bar is formed by rolling steel pipes or steel bars or steel plates; the closed cover plate and the toe support pier are integrally prepared from reinforced concrete materials.
In the fourth step, the stiff connecting rib is formed by rolling steel pipes or section steel or steel plates, one end of the stiff connecting rib is inserted into a wall body at the top end of the active retaining wall, and the other end of the stiff connecting rib extends out of the top surface of the wall top reinforcing plate by 20-50cm and is welded with the wall top reinforcing plate; the wall top stiffened plate is formed by rolling steel plates and is distributed at equal intervals along the longitudinal direction of the active retaining wall; the wall body lifting body is made of reinforced concrete materials; the platform supporting rib consists of a stiff steel pipe 40 and a pipe cavity grouting body 41 in the stiff steel pipe, and slurry overflow holes 42 are formed in the side wall of the stiff steel pipe.
In the fifth step, the wall back reinforcing ribs are formed by rolling steel plates and are distributed at uniform intervals along the longitudinal direction of the active retaining wall, and holes for the rear anchor tie bars, the wall back anchor bars and the rear drain pipes to penetrate are preset in the wall back reinforcing ribs.
In the sixth step, the wall back water-collecting layer adopts open graded medium coarse sand or sand gravel; the sinking anchor plate is formed by rolling a steel plate, and the upper surface of the sinking anchor plate is vertically welded and connected with the anti-floating anchor bars; the anti-floating anchor bar is formed by rolling steel pipes or deformed bars.
In the seventh step, the light filling body adopts the density of 0.8-1.0g/cm 3 Is a foam concrete of (2); the wall back hardening layer adopts concrete.
A specific example of a set of components is given below:
the active retaining wall is a reinforced concrete gravity retaining wall, and the concrete strength grade is C30; the wall support plate is formed by rolling steel plates with the thickness of 20mm, the width is 20cm, the length is 40cm, one plate is distributed every 2m along the longitudinal direction of the active retaining wall, and the depth anchored into the active retaining wall is 20cm; the foundation soil body is cohesive soil in a hard plastic state; the counter-force supporting pier is formed by rolling a steel plate with the thickness of 10mm, the cross section of the counter-force supporting pier is in a right triangle shape, the length of the right angle side is 30cm, and a supporting pier anchor plate is welded on the side of the supporting anchor pier, which is away from the active retaining wall; the anchor plate of the support pier is formed by rolling a steel plate with the thickness of 10mm and the width of 20cm, and a hole for the support pier to penetrate is preset in the anchor plate of the support pier; the supporting anchor pier is formed by rolling a steel pipe with the diameter of 100 mm; the temporary stay bar is formed by rolling H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12, and two ends of the temporary stay bar are respectively welded with the wall surface stay plate and the back pressure stay plate; the wall bracing plate is formed by rolling a steel plate with the thickness of 20mm, and the width is 30cm; the back pressure supporting plate is formed by rolling a steel plate with the thickness of 20mm, and screw holes for connecting positioning bolts are preset on the back pressure supporting plate; the positioning bolt is formed by rolling a high-strength screw rod with the diameter of 30 mm; the retaining wall foundation is made of reinforced concrete, the strength grade of the concrete is C35, and the thickness of the retaining wall foundation is 40cm; the anti-skid anchor pile is formed by rolling a round steel pipe with the diameter of 300mm, the wall thickness of 10mm and the length of 5m; the anchor pile filling body adopts self-compacting concrete with the strength grade of C30; the stiff reinforcement body is formed by rolling profile steel with the specification of 150 multiplied by 7 multiplied by 10, and the top end is vertically welded and connected with the built-in anchor plate; the built-in anchor plate is formed by rolling a steel plate with the thickness of 20mm, and the diameter is 200mm; the supporting anchor bar is formed by rolling a steel pipe with the diameter of 60mm, and two ends of the supporting anchor bar are respectively anchored into a retaining wall foundation for 30cm; the sealing cover plate and the wall toe support pier are integrally cast by adopting reinforced concrete materials, the thickness of the sealing cover plate is 20cm, and the thickness of the wall toe support pier is 30cm; the cover plate connecting ribs adopt screw thread reinforcing steel bars with the diameter of 32 mm; original wall back filling bodyBroken gravel materials are adopted; the supporting soil body is cohesive soil in a hard plastic state; the rear anchor lacing wire is formed by rolling a twisted steel bar with the diameter of 32 mm; the stiff connecting ribs are formed by rolling profile steel with the specification of 150 multiplied by 7 multiplied by 10, 1 reinforcing rib is arranged every 2m along the longitudinal direction of the active retaining wall, one end of each reinforcing rib is inserted into a wall body of the active retaining wall by 0.5m, and the other end of each reinforcing rib extends out of the top surface of the top reinforcing rib plate by 50cm and is welded with the top reinforcing rib plate; the wall top stiffened plate is formed by rolling a steel plate with the thickness of 10mm, and the width is 30cm; the wall body lifting body is made of reinforced concrete materials, and the strength grade of the concrete is C35; the platform supporting rib comprises a stiff steel pipe and a pipe cavity grouting body, and slurry overflow holes are formed in the side wall of the stiff steel pipe; the stiff steel pipe is formed by rolling a steel pipe with the diameter of 100mm, and the grouting body of the pipe cavity is made of concrete grouting material with the mark of C30; the diameter of the slurry overflow hole is 50mm; the wall back reinforcing rib is formed by rolling a steel plate with the thickness of 10mm, the width is 30cm, 1 wall back reinforcing rib is arranged every 2m along the longitudinal direction of the active retaining wall, and holes for the rear anchor tie bars, the wall back anchor bars and the rear drain pipes to penetrate are preset in the wall back reinforcing rib; the wall back anchor bar adopts a threaded ribbed steel bar with the diameter of 32 mm; the rear drain pipe and the original drain pipe are both drain hoses with the diameter of 60 mm; the oblique reinforcing ribs are formed by rolling steel pipes with the diameters of 100 mm; the wall back casting body is made of reinforced concrete, the strength grade of the concrete is C35, the width is 50cm, and the thickness is 20cm; the wall back water collecting layer adopts open graded sand gravel; the sinking anchor plate is formed by rolling a steel plate with the thickness of 10mm, the diameter is 20cm, and the upper surface is vertically welded and connected with the anti-floating anchor bars; the anti-floating anchor bar is formed by rolling a twisted steel bar with the diameter of 32 mm; the density of the lightweight filling body is 0.8g/cm 3 Is a foam concrete of (2); the filling pressing plate is formed by rolling a steel plate with the thickness of 10mm, and the diameter is 20cm; the wall back hardening layer is formed by casting concrete with the strength grade of C35, and the thickness is 15cm.
According to the repairing construction method, the temporary stay bars are arranged between the active retaining wall and the foundation soil body, and the positioning bolts are used for applying side support to the temporary stay bars and the active retaining wall, so that the dynamic support stability of the active retaining wall is realized, and the influence of retaining wall foundation reinforcement on the stability of the active retaining wall is reduced.
According to the repairing construction method, the anti-slip anchor piles are inserted into the leading holes at the toe part of the retaining wall foundation, the sealing cover plate and the toe supporting piers are respectively constructed on the upper surface and the front end of the retaining wall foundation, and the supporting anchor bars are arranged between the retaining wall foundation and the built-in anchor plates, so that the anti-slip performance and the anti-overturning performance of the retaining wall structure are improved.
The repairing construction method comprises the steps of arranging a stiff connecting rib and a wall top reinforcing plate at the top end of an active retaining wall, and arranging a wall body lifting body at the top of the active retaining wall; the platform supporting ribs are arranged on the wall top reinforcing plate in a beating mode towards the supporting soil retaining body, so that the platform supporting ribs and the wall top reinforcing plate are combined to form an unloading platform, and the bearing performance of the active service retaining wall and the wall body lifting body is improved.
The repairing construction method is characterized in that the wall back reinforcing ribs and the wall back pouring body are arranged along the wall body lifting body and the wall back side of the active retaining wall, and the rear anchor tie bars are arranged between the wall back reinforcing ribs and the support retaining wall, so that the wall back layout of the rear anchor tie bars is realized, the layout problem of the transverse reinforcing ribs is solved, and the influence of the transverse reinforcing rib layout on the integrity of the active retaining wall can be reduced.
According to the repairing construction method, the wall back water collecting layer is paved on the upper surface of the original wall back filling body, and is communicated with the rear drain pipe, so that the drainage performance of the active retaining wall is improved; meanwhile, the sinking anchor plate and the anti-floating anchor bars are buried in the wall back water-collecting layer, and the light filling body and the wall back hardening layer are sequentially arranged on the upper part of the wall back water-collecting layer, so that the wall back soil pressure of the retaining wall is reduced.
If this patent discloses or relates to components or structures that are fixedly connected to each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In the description of this patent, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the patent, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the patent.
While the foregoing is directed to the preferred embodiment, other and further embodiments of the invention will be apparent to those skilled in the art from the following description, wherein the invention is described, by way of illustration and example only, and it is intended that the invention not be limited to the specific embodiments illustrated and described, but that the invention is to be limited to the specific embodiments illustrated and described.
Claims (8)
1. The construction method for repairing the active retaining wall is characterized by comprising the following steps of:
step one, construction preparation: performing active retaining wall disease test, and preparing materials and devices required by construction;
step two, temporary supporting body layout: a wall surface support plate is arranged on the wall surface of the active retaining wall, a counter-force support pier and a support pier anchor plate for supporting the counter-force support pier are arranged on the foundation soil body, and the support pier anchor plate is firmly connected with the foundation soil body through the support anchor pier; firstly, respectively arranging a wall surface supporting plate and a counter-pressure supporting plate at two ends of the temporary supporting rod, then arranging the temporary supporting rod between the wall surface and the counter-force supporting pier to enable the wall surface supporting plate to abut against the active retaining wall and the wall surface supporting plate above the active retaining wall, and installing a positioning bolt on the counter-pressure supporting plate in a threaded manner to enable the positioning bolt to abut against the counter-force supporting pier, and applying a jacking force to the temporary supporting rod and the active retaining wall by using the positioning bolt;
step three, wall toe reinforcement treatment: inserting anti-slip anchor piles into the guide holes of the foundation soil body at the toe part of the retaining wall foundation at the lower end of the active retaining wall, and filling anchor pile filling bodies and stiff reinforcement bodies into the tube cores of the anti-slip anchor piles; a supporting anchor bar is arranged between the built-in anchor plate at the top end of the stiff reinforcement body and the retaining wall foundation; respectively constructing a closed cover plate and a wall toe supporting pier on the upper surface and the front end of a retaining wall foundation wall toe, and presetting cover plate connecting ribs adjacent to an active retaining wall in the rear end of the closed cover plate;
step four, wall lifting body setting: removing an original wall back filling body at the upper part of the back part of the active retaining wall, and inserting a rear anchor lacing wire into a leading hole of a branch retaining body at the back side of the original wall back filling; inserting a stiff connecting rib into a top leading hole of the active retaining wall, arranging a wall top reinforcing plate at the top of the active retaining wall, and firmly connecting the wall top reinforcing plate with the stiff connecting rib; casting concrete on the top support mould of the active retaining wall to form a wall body lifting body; the upper surfaces of the longitudinally adjacent wall top stiffening plates are provided with stiffening plate connecting ribs, platform supporting ribs are arranged between the wall top stiffening plates and the supporting soil retaining bodies, the upper ends of the platform supporting ribs are connected with the wall top stiffening plates, and the lower ends of the platform supporting ribs are inserted into the original wall back filling bodies;
fifthly, constructing a wall back casting body: paving a wall back reinforcing rib with an L-shaped cross section along the wall body lifting body and the wall back side of the active retaining wall, firmly connecting the wall back reinforcing rib with the wall body lifting body and the active retaining wall by using a wall back anchor rib, and firmly connecting the upper end of a rear anchor tie rib with the lower end of the wall back reinforcing rib; the wall back reinforcing rib and the wall top reinforcing plate are provided with oblique reinforcing ribs for connecting the two, and a wall back pouring body is arranged on the side, away from the active retaining wall, of the wall back reinforcing rib;
step six, constructing a wall back catchment layer: a rear drain pipe is inserted in a wall body drill hole along the longitudinal direction of the active retaining wall above the original drain pipe of the active retaining wall; paving a wall back water collecting layer on the upper surface of the original wall back filling body, and enabling the wall back water collecting layer to be communicated with a rear drain pipe; embedding a sinking anchor plate and an anti-floating anchor bar in a wall back catchment layer, and fixedly mounting the sinking anchor plate at the lower end of the anti-floating anchor bar;
seventh, wall back soil mass filling: pouring a light filling body on the upper part of the wall back water collecting layer, and installing a filling pressing plate on the top end of the anti-floating anchor bar, wherein the upper end of the filling pressing plate is higher than the light filling body; and pouring a wall back hardening layer on the top surface of the light filling body, and covering the filling pressing plate.
2. The construction method for repairing an active retaining wall according to claim 1, wherein: in the second step, the counterforce support pier is formed by rolling a steel plate, the cross section of the counterforce support pier is in a right triangle shape, and the anchor plate of the support pier is welded on the side of the counterforce support pier, which is away from the active retaining wall; the support pier anchor plate is formed by rolling a steel plate, and holes for supporting anchor piers to penetrate are preset in the support pier anchor plate; the supporting anchor pier is formed by rolling steel pipes or section steel; the temporary stay bar is formed by rolling steel pipes or section steel, and two ends of the temporary stay bar are respectively welded with the wall surface stay plate and the back pressure stay plate; the back pressure supporting plate is formed by rolling a steel plate, and screw holes for connecting with positioning bolts are preset on the back pressure supporting plate.
3. The construction method for repairing an active retaining wall according to claim 1, wherein: in the third step, the cross section of the toe pier is rectangular, the width is 0.5-1m, and the height extends to 0.5-2m below the elevation of the foundation bottom surface of the retaining wall.
4. The construction method for repairing an active retaining wall according to claim 1, wherein: in the third step, the anti-skid anchor pile is formed by rolling a round steel pipe; the anchor pile filling body adopts self-compacting concrete; the stiff reinforcement body is formed by rolling profile steel or steel pipes, and the top end of the stiff reinforcement body is vertically welded and connected with the built-in anchor plate; the supporting anchor bar is formed by rolling steel pipes or steel bars or steel plates; the closed cover plate and the toe support pier are integrally prepared from reinforced concrete materials.
5. The construction method for repairing an active retaining wall according to claim 1, wherein: in the fourth step, the stiff connecting rib is formed by rolling steel pipes or section steel or steel plates, one end of the stiff connecting rib is inserted into a wall body at the top end of the active retaining wall, and the other end of the stiff connecting rib extends out of the top surface of the wall top reinforcing plate by 20-50cm and is welded with the wall top reinforcing plate; the wall top stiffened plate is formed by rolling steel plates and is distributed at equal intervals along the longitudinal direction of the active retaining wall; the wall body lifting body is made of reinforced concrete materials; the platform supporting rib consists of a stiff steel pipe and a pipe cavity grouting body in the stiff steel pipe, and slurry overflow holes are formed in the side wall of the stiff steel pipe.
6. The construction method for repairing an active retaining wall according to claim 1, wherein: in the fifth step, the wall back reinforcing ribs are formed by rolling steel plates and are distributed at uniform intervals along the longitudinal direction of the active retaining wall, and holes for the rear anchor tie bars, the wall back anchor bars and the rear drain pipes to penetrate are preset in the wall back reinforcing ribs.
7. The construction method for repairing an active retaining wall according to claim 1, wherein: in the sixth step, the wall back water-collecting layer adopts open graded medium coarse sand or sand gravel; the sinking anchor plate is formed by rolling a steel plate, and the upper surface of the sinking anchor plate is vertically welded and connected with the anti-floating anchor bars; the anti-floating anchor bar is formed by rolling steel pipes or deformed bars.
8. The construction method for repairing an active retaining wall according to claim 1, wherein: in the seventh step, the light filling body adopts the density of 0.8-1.0g/cm 3 Is a foam concrete of (2); the wall back hardening layer adopts concrete.
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